本文使用指令、声明或扩展元素等术语对样式表元素和属性作更精确地分类。

This article USES terms such as instructions, declarations, and extension elements to classify the elements and attributes of a stylesheet more precisely.

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第一遍扫视用户源语言，进行语法检查并建立各种表格，第二遍产生结果模块，它们十分类似一组机器代码指令。

The first pass scans the user's source language, checks the syntax, and draws up various tables. The second pass produces object modules, which are like a group of machine-code instructions.

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历年来，国内外学者对教师指令语的研究主要集中在教师发出有效指令的方法，教师指令的分类与功能等方面。

For a long time the scholars and educators both in China and in western countries have mainly studied types of directives, functions of directives and effects of directives.

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